US Plant Patent PP15721
Pewter Lace
Athyrium plant named ‘Pewter Lace’
PUBLIC DOMAIN
Patent expired July 2, 2024. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on June 18, 2024. This patent earned 14 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP15721
- Filed
- June 18, 2004
- Granted
- April 12, 2005
- Expires
- July 2, 2024
- Assignee
- TERRA NOVA NURSERIES INC
- Inventor
- HEIMS DANIEL M
Abstract
A new and distinct cultivar of Athyrium niponicum var. pictum plant characterized by the pewter tone to the leaves, silver over grey green, with a pink rachis. This coloring persists from new growth to mature.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
1. A new and distinct Athyrium niponicum var. pictum plant substantially as shown and described, characterized by the pewter tone to the leaves, silver over grey green, with a pink rachis, said coloring persisting from new to mature growth.
Read the full patent: US Plant Patent PP15721 in full — the complete specification, every figure, and the file history.